CN111254834A - Square steel beam bridge and splicing method thereof - Google Patents
Square steel beam bridge and splicing method thereof Download PDFInfo
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- CN111254834A CN111254834A CN202010090546.6A CN202010090546A CN111254834A CN 111254834 A CN111254834 A CN 111254834A CN 202010090546 A CN202010090546 A CN 202010090546A CN 111254834 A CN111254834 A CN 111254834A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
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Abstract
The invention discloses a square steel beam bridge and a splicing method thereof, belonging to the technical field of bridge engineering. The square steel beam bridge comprises a support, a cement concrete pavement layer and a plurality of square steel beams, wherein the square steel beams are sequentially arranged on the support side by side, and every two adjacent square steel beams are fixed through bolts; each cross connector passing through a plurality of cross connector holes in sequence from the head end to the tail end; self-leveling cement mortar is filled in the square steel beams and is condensed and fixed with the transverse connecting pieces to form a bridge bearing structure; and a cement concrete pavement layer is fixedly arranged above the top plate. The invention also discloses a splicing method of the square steel beam bridge. Under the same height, the bearing capacity of the square steel beam bridge is far higher than that of a reinforced concrete beam bridge and a prestressed concrete beam bridge; under the same load level, the building height of the square steel beam bridge is far less than that of a reinforced concrete beam bridge and a prestressed concrete beam bridge, so that the square steel beam bridge is more suitable for small-span bridges with the span of less than 20 m.
Description
Technical Field
The invention relates to a square steel beam bridge and a splicing method thereof, belonging to the technical field of bridge engineering.
Background
Compared with reinforced concrete bridges, the steel structure bridge has the following advantages: (1) the method is suitable for industrial manufacturing and quick in construction; (2) the span is the same, the structure height is smaller, and the arrangement is more flexible; (3) easy repair and replacement; (4) the material can be recycled, and the construction process has less dust and is more environment-friendly. But because of the insufficient steel yield and low quality in China, the steel structure is generally only applied to large-span bridges.
In recent years, with the increase of steel yield, quality improvement and processing capacity improvement in China, the condition for popularizing steel structure bridges in highway construction is mature. The popularization and application strength of steel structure bridges is increased in the construction of highways in various places, and steel structure schemes are adopted in part of test point projects.
The large-span bridge mainly adopts a scheme of steel box girders and steel trussed girders, the medium-span bridge mainly adopts a scheme of steel plate girders (mainly adopting I-shaped sections) and steel-concrete composite girders, and for the small-span bridge with the span of less than 20m, an economical and reasonable scheme of the steel structure bridge is not provided at present, and a reinforced concrete or prestressed concrete structure form is still adopted in practice.
In view of the above, it is necessary to develop a steel structure bridge form suitable for a small span bridge with a span of 20m or less to overcome the disadvantages of the prior art.
Disclosure of Invention
The invention aims to provide a square steel beam bridge. Compared with the prior art, the square steel beam bridge has the advantages of quick construction, high bearing capacity and guaranteed construction quality. Under the same height, the bearing capacity of the square steel beam bridge is far higher than that of a reinforced concrete beam bridge and a prestressed concrete beam bridge; under the same load level, the building height of the square steel beam bridge is more than 30 percent smaller than that of a reinforced concrete beam bridge and a prestressed concrete beam bridge. In the design of the small-span bridge, the proportion of the vehicle load effect in the design load effect is far higher than that of other bridges, so the invention is more suitable for the small-span bridge with the span of less than 20 m.
The technical scheme for solving the technical problems is as follows: a square steel beam bridge comprises a support, a cement concrete pavement layer and a plurality of square steel beams, wherein each square steel beam comprises a bottom plate, two webs respectively arranged on two sides of the bottom plate and a top plate arranged at the top ends of the two webs, the bottom plate, the two webs and the top plate enclose a hollow box body, and the end parts of two ends of each square steel beam are provided with plugging plates for plugging the box body; a plurality of top plate holes for filling self-leveling cement mortar are arranged on the top plate at equal intervals along the bridge direction; a plurality of transverse connecting piece holes for the transverse connecting pieces to pass through and a plurality of bolt holes for the bolts to pass through are correspondingly arranged on the two webs at equal intervals along the bridge direction;
the plurality of square steel beams are sequentially arranged on the support in parallel from the head end to the tail end along the transverse bridge direction, and two adjacent square steel beams are fixed through the bolts;
the transverse connecting pieces are multiple, each transverse connecting piece sequentially penetrates through the transverse connecting piece holes from the head end to the tail end along the bridge direction, and two ends of each transverse connecting piece respectively extend out of the square steel beams at the head end and the tail end;
self-leveling cement mortar is filled in the square steel beams after passing through the top plate holes and is condensed and fixed with the transverse connecting pieces to form a bridge bearing structure;
and the cement concrete pavement layer is fixedly arranged above the top plates.
The head end and the tail end respectively refer to the outermost square steel beams at the two ends of the transverse bridge of the square steel beam bridge.
Description of the principles of the invention:
first, the square steel beam is used as a main bearing component, and the square steel beam has high bending rigidity, torsional rigidity and bending bearing capacity and excellent stress performance. The square steel beams can adopt section steel rolled by a steel mill, can also adopt steel plate welding, and are then transported to a construction site for assembly. Compared with a reinforced concrete structure or a prestressed concrete structure bridge, the invention has the following advantages by adopting the square steel beam: firstly, the application field is wider; secondly, the method is more convenient and saves cost; thirdly, the requirements on the operation level of workers and mechanical equipment are not high, and the construction speed is higher.
The second point, among the prior art, some assembled steel decking, the square steel roof beam is inside not to fill self-leveling cement mortar or concrete, and destructive load test shows that its destruction form belongs to local unstability destruction, destroys the web near roof and the direct action roof of load that takes place at the direct action roof of load, and the stress of steel far does not reach the tensile strength of steel during the destruction.
Self-leveling cement mortar refers to concrete which can flow and be dense under the action of self gravity, can completely fill a template even if dense steel bars exist, and simultaneously obtains good homogeneity without additional vibration. According to the invention, the self-leveling cement mortar is filled in each square steel beam, and the self-leveling cement mortar mainly has the following functions: the local stability of the square steel beam can be improved, and the defect that the square steel beam is easy to be locally unstable under the action of the load of the automobile wheels is overcome; secondly, the rigidity of the bridge structure is improved, and the driving performance is improved; thirdly, self-leveling cement mortar filled in the square steel beams is condensed and fixed with the transverse connecting piece, and a plurality of square steel beams which are arranged side by side but are mutually independent are connected into a common stressed whole; fourthly, moisture is difficult to avoid in the square steel beam in the prior art, and moisture, air and steel meet and can corrode. Self-leveling cement mortar is strong basicity, and when steel and strong basicity material contact, the steel surface can form the compact passive film of one deck, makes steel atom and external water, air insulation, can not take place the corrosion, can play the corrosion protection effect to inside the square steel roof beam, and the water gets into the inside corruption that arouses of square steel roof beam during avoiding the construction.
And thirdly, the plugging plates are used for plugging the end parts of the two ends of the square steel beam box body, so that a template support is provided for filling concrete into the subsequent square steel beam.
Fourth, in the present invention, the top plate holes mainly have the following functions: firstly, a channel for subsequent filling of self-leveling cement mortar is provided; secondly, a working space is provided for subsequent operators to penetrate and tighten the bolts; thirdly, the guide function is played for the subsequent transverse connecting piece to pass through.
Fifthly, in the invention, the bolt holes are used for allowing bolts to pass through, every two adjacent square steel beams are fixed through the bolts, and the plurality of square steel beams are tightly connected together through fastening force generated by screwing the bolts. Meanwhile, the bolt fixing mode is adopted, and the assembling and the disassembling are convenient.
And sixthly, the transverse connecting piece holes are used for allowing the transverse connecting pieces to penetrate through, self-leveling cement mortar filled in the subsequent square steel beams is condensed and fixed with the transverse connecting pieces together, and a plurality of square steel beams which are arranged side by side but are mutually independent are connected into a whole with common stress.
In conclusion, the square steel beam bridge has the advantages of simple structure, convenience in installation on a construction site and strong bearing capacity. Tests show that the bearing capacity of the invention is far higher than that of a reinforced concrete beam bridge and a prestressed concrete beam bridge at the same height. Under the same load level, the building height of the invention is far less than that of a reinforced concrete beam bridge and a prestressed concrete beam bridge, and the invention is particularly suitable for small-span bridges with span less than 20 m.
The square steel beam bridge has the beneficial effects that:
1. under the same height, the bearing capacity of the square steel beam bridge is far higher than that of a reinforced concrete beam bridge and a prestressed concrete beam bridge. Under the same load level, the building height of the square steel beam bridge is far less than that of the reinforced concrete beam bridge and the prestressed concrete beam bridge. Therefore, the square steel girder bridge of the present invention is particularly suitable for a small span bridge having a span of 20m or less.
2. According to the square steel beam used in the square steel beam bridge, the top plate holes, the transverse connecting piece holes, the holes of the bolt holes and the installation of the plugging plates can be processed and completed in a factory and then transported to a construction site, and workers only need to simply install bolts and penetrate the transverse connecting pieces, so that the requirements on the operation level of the workers and mechanical equipment are not high, the construction speed is greatly improved, a large amount of labor and material cost is saved, and the construction period is shortened.
3. According to the invention, the self-leveling cement mortar is filled in each square steel beam, and the self-leveling cement mortar mainly has the following functions: the local stability of the square steel beam can be improved, and the defect that the square steel beam is easy to be locally unstable under the action of the load of the automobile wheels is overcome; secondly, the rigidity of the bridge structure is improved, and the driving performance is improved; thirdly, self-leveling cement mortar filled in the square steel beams is condensed and fixed with the transverse connecting piece, and a plurality of square steel beams which are arranged side by side but are mutually independent are connected into a common stressed whole; fourthly, the self-leveling cement mortar is strong in alkalinity, can play a role in preventing corrosion in the square steel beam, and avoids corrosion caused when the construction water body enters the square steel beam.
4. In the invention, because the torsional rigidity of the square steel beam is high, the risk of overturning and instability does not exist in the construction process, and the construction safety is ensured. And moreover, the self-leveling cement mortar filled in the square steel beam improves the local stability of the square steel beam, ensures that the square steel beam cannot be damaged by local instability, and has higher safety.
5. In the prior art, a plurality of transverse partition plates are arranged inside some fabricated steel bridge deck plates, so that profile steel cannot be adopted, and the fabricated steel bridge deck plates can only be formed by bending and welding steel plates, so that the further application of the method is limited. The square steel beam can be formed by bending and welding profile steel or steel plates. When the steel is adopted in a large scale, the adoption of the section steel can obviously lower the cost and has wider application prospect.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the aperture of each of the transverse connector holes is 20mm-30mm larger than the diameter of the transverse connector; and the distance between two adjacent transverse connecting piece holes on each web plate along the transverse bridge direction is 2m-3 m.
The adoption of the further beneficial effects is as follows: the diameter of the transverse connector bore is slightly larger than the diameter of the transverse connector to facilitate the passage of the transverse connector through the transverse connector bore.
Further, the transverse connecting piece is a steel pipe or round steel.
The adoption of the further beneficial effects is as follows: the stress state of the transverse connecting piece is mainly shear resistance, and when the load grade is smaller, a steel pipe can be adopted. When the load grade is higher, adopt the round steel, the sectional area of round steel is greater than the round steel of equal diameter, and shear strength and rigidity are also showing and are greater than the round steel of equal diameter, can further improve the wholeness of square steel beam bridge like this, and then improve its bearing capacity.
Further, the self-leveling cement mortar is prepared from a mixed dry powder material and water according to the weight part ratio of 1: (0.15-0.25), wherein the dry powder mixture comprises the following components in parts by weight: 1 part of cement, 0.5-1.5 parts of sand, 0.2-0.4 part of fly ash, 0.01-0.02 part of high-efficiency water reducing agent, 0.05-0.15 part of expanding agent, 0-0.00008 part of aluminum powder, 0-0.005 part of defoaming agent and 0.001-0.02 part of latex powder.
The adoption of the further beneficial effects is as follows: the self-leveling cement mortar with the parameters has good fluidity and has the characteristics of self-compaction, vibration-free and the like in construction. After the square steel beam is filled, the local stability of the square steel beam can be improved, and the bearing capacity of the square steel beam is further improved. The self-leveling cement mortar with the parameters has high compressive strength, and the compressive strength of a standard test piece is 100 MPa.
The self-leveling cement mortar may be commercially available, for example, from Ovumgur mechanical corporation, Liuzhou or Guilin Hancheng technology corporation.
Furthermore, non-vulcanized anticorrosive sealant is coated at the joint of every two adjacent square steel beams.
The adoption of the further beneficial effects is as follows: the prior art generally adopts surface anti-corrosion measures, but does not consider the point that the service life of the surface anti-corrosion measures is far shorter than that of bridges. According to the invention, the non-vulcanized anticorrosive sealant is coated at the joint of every two adjacent square steel beams, so that the anticorrosive requirement between the adjacent square steel beams can be met, and the two adjacent square steel beams cannot be corroded due to the entrance of air and water. The non-vulcanized anticorrosive sealant is an anticorrosive material, has the effective life of 50 years and can have the same service life as the main structure of the bridge. The non-vulcanized anticorrosive sealant can keep a soft state for a long time, is not hardened and cracked, has excellent low-temperature performance, is anti-aging and salt mist resistant, can solve the problems of easy deterioration and easy leakage caused by adopting grease sealing in the prior art, and can meet the protection requirement of long service life of a bridge structure.
The non-vulcanized anticorrosive sealant can be purchased commercially, for example, from Ovum mechanical Co., Ltd, Liuzhou, with the product parameters: the appearance is homogeneous paste; the density is less than or equal to 1.4g/cm3(ii) a The content of non-volatile components is more than or equal to 98 percent; heat resistance (90 ℃, 12 h): does not flow and crust; low temperature resistance (-40 ℃): the bending of 180 degrees does not crack; the adhesion rate is more than or equal to 90 percent; salt spray resistance (7 d): the surface coated by the sealant has no corrosion defect.
Furthermore, the cement concrete pavement layer comprises shear nails, a reinforcing mesh and ordinary cement concrete, the shear nails are welded on the top plate, the reinforcing mesh and the shear nails are bound together, and the ordinary cement concrete pavement is carried out on the reinforcing mesh.
The adoption of the further beneficial effects is as follows: the cement concrete pavement layer and the square steel beam are structurally connected into a whole, so that the durability of bridge deck pavement in the bridge operation stage can be ensured.
Further, the strength grade of the general concrete is not lower than C40.
The second object of the present invention is to provide a method for splicing the above-mentioned square steel girder bridge. The splicing method of the square steel beam bridge is simple, easy to operate, good in market prospect and suitable for large-scale popularization and application.
The technical scheme for solving the technical problems is as follows: the splicing method of the square steel beam bridge comprises the following steps:
step 1: drilling of square steel beams
Taking a plurality of square steel beams, wherein each square steel beam comprises a bottom plate, two webs respectively arranged on two sides of the bottom plate and a top plate arranged at the top ends of the two webs, and the bottom plate, the two webs and the top plate form a box body with a hollow interior;
plugging the end parts of the two ends of the box body by using plugging plates; a plurality of top plate holes for filling self-leveling cement mortar are formed in the top plate at equal intervals along the bridge direction; correspondingly forming a plurality of transverse connecting piece holes for the transverse connecting pieces to pass through and a plurality of bolt holes for the bolts to pass through on the two webs at equal intervals along the bridge direction to obtain the square steel beam after hole opening processing;
step 2: mounting of square steel beams
Transporting the square steel beams with the holes processed in the step (1) to a construction site, arranging the square steel beams on a support in parallel from the head end to the tail end along the direction of a transverse bridge, and fixing every two adjacent square steel beams through bolts;
and step 3: through the transverse connecting piece
Sequentially passing the plurality of transverse connecting pieces through the plurality of transverse connecting piece holes from the head end to the tail end along the bridge direction, wherein two ends of each transverse connecting piece hole extend out of the square steel beam at the head end and the tail end respectively;
and 4, step 4: self-leveling cement mortar filling
Self-leveling cement mortar is filled in the square steel beams after passing through the top plate holes and is condensed and fixed with the transverse connecting pieces to form a bridge bearing structure;
and 5: laying cement concrete pavement layer
And fixedly arranging the cement concrete pavement layer above the top plates to obtain the square steel beam bridge.
The splicing method of the square steel beam bridge has the beneficial effects that:
the splicing method of the square steel beam bridge is simple, easy to operate, good in market prospect and suitable for large-scale popularization and application.
In the step 1, the square steel beam can be formed by bending and welding profile steel or steel plates. When the steel is adopted in a large scale, the adoption of the section steel can obviously lower the cost and has wider application prospect.
After the hole opening processing of the square steel beam in the step 1 is completed, the square steel beams which are adjacent in pairs can be fixed through the bolts, then the square steel beams are transported to a construction site, the square steel beams are sequentially arranged on the support side by side from the head end to the tail end along the direction of the transverse bridge, non-vulcanized anticorrosive sealant is coated at the joint of the square steel beams which are adjacent in pairs, and then subsequent work is carried out. Therefore, the workload on a construction site can be reduced, and the construction speed is further accelerated.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, in the step 2, non-vulcanized anticorrosive sealant is coated at the joint of every two adjacent square steel beams.
The adoption of the further beneficial effects is as follows: the prior art generally adopts surface anti-corrosion measures, but does not consider the point that the service life of the surface anti-corrosion measures is far shorter than that of bridges. According to the invention, the non-vulcanized anticorrosive sealant is coated at the joint of every two adjacent square steel beams, so that the anticorrosive requirement between the adjacent square steel beams can be met, and the two adjacent square steel beams cannot be corroded due to the entrance of air and water. The non-vulcanized anticorrosive sealant is an anticorrosive material, has the effective life of 50 years and can have the same service life as the main structure of the bridge. The non-vulcanized anticorrosive sealant can keep a soft state for a long time, is not hardened and cracked, has excellent low-temperature performance, is anti-aging and salt mist resistant, can solve the problems of easy deterioration and easy leakage caused by adopting grease sealing in the prior art, and can meet the protection requirement of long service life of a bridge structure.
The non-vulcanized anticorrosive sealant can be purchased commercially, for example, from Ovum mechanical Co., Ltd, Liuzhou, with the product parameters: the appearance is homogeneous paste; the density is less than or equal to 1.4g/cm3(ii) a The content of non-volatile components is more than or equal to 98 percent; heat resistance (90 ℃, 12 h): does not flow and crust; low temperature resistance (-40 ℃): the bending of 180 degrees does not crack; the adhesion rate is more than or equal to 90 percent; salt spray resistance (7 d): the surface coated by the sealant has no corrosion defect.
Further, in step 5, the paving method of the cement concrete paving layer comprises the following steps: firstly, welding shear nails above a plurality of top plates, then binding a reinforcing mesh and the shear nails together, and then paving common cement concrete on the reinforcing mesh.
The adoption of the further beneficial effects is as follows: by adopting the paving method, the cement concrete pavement layer and the square steel beam are structurally connected into a whole through the shear nails, so that the durability of bridge deck pavement in the bridge operation stage can be ensured.
Drawings
Fig. 1 is a plan view of a square steel girder bridge according to the present invention.
Fig. 2 is an elevation view of the square steel girder bridge of the present invention.
Figure 3 is a partial isometric view of an end of a square steel beam of the present invention.
FIG. 4 is a partial connecting shaft drawing of the square steel beam of the present invention.
FIG. 5 is an elevation view of a square steel beam of the present invention.
FIG. 6 is a top view of the square steel beam of the present invention.
In the drawings, the elements denoted by the reference numerals have the following meanings:
1. the concrete pavement structure comprises square steel beams, 2 parts of plugging plates, 3 parts of transverse connecting piece holes, 4 parts of bolt holes, 5 parts of top plate holes, 6 parts of transverse connecting pieces, 7 parts of shear nails, 8 parts of reinforcing mesh, 9 parts of cement concrete pavement layers, 10 parts of bottom plates, 11 parts of web plates, 12 parts of top plates, 13 parts of bolts, 14 parts of supports, 15 parts of common cement concrete.
Detailed Description
The principles and features of this invention are described below in conjunction with the following detailed drawings, which are given by way of illustration only and are not intended to limit the scope of the invention.
Example 1
As shown in fig. 1-6, the square steel girder bridge of the present embodiment is located in the state of the cantonese, and is a road bridge with a standard span of 8 m. Superstructure adopts square steel beam bridge, and net length 7960mm including support 14, cement concrete pavement layer 9 and 22 square steel roof beams 1, square steel roof beam 1 adopts shaped steel. Every square steel beam 1 all includes bottom plate 10, set up respectively in two webs 11 of bottom plate 10 both sides and set up in two the roof 12 on 11 tops of web, bottom plate 10, two web 11 with roof 12 encloses into inside hollow box. The side length of the cross section of the square steel beam 1 is 300mm, the thickness of the bottom plate 10 is 12mm, the thickness of the web plate 11 is 12mm, and the thickness of the top plate 12 is 12 mm.
The end parts of the two ends of each square steel beam 1 are respectively provided with a plugging plate 2 for plugging the box body; the side length of the plugging plate 2 is equal to the side length of the cross section of the square steel beam 1 minus twice the thickness of the web 11 and is equal to 276 mm.
4 top plate holes 5 for filling self-leveling cement mortar are arranged on the top plate 12 along the bridge direction at equal intervals; top plate hole 5 is the rectangle, first top plate hole 5 distance the distance of 12 tip of roof is 150mm, and the interval of two liang of adjacent top plate holes 5 is 2553 mm.
4 transverse connecting piece holes 3 for steel pipes 6 to pass through and a plurality of bolt holes 4 for bolts 13 to pass through are correspondingly arranged on the two webs 11 at equal intervals along the bridge direction; the diameter of the transverse connector hole 3 is 120mm, the distance from the first transverse connector hole 3 to the end part of the web plate 11 is 305mm, and the distance between every two adjacent transverse connector holes 3 is 2650 mm. Bolt holes 4, the diameter of which is 10mm, are provided in the upper right and lower left of each cross-connector hole 3.
The plurality of square steel beams 1 are sequentially arranged on the support 14 side by side from the head end to the tail end along the transverse bridge direction. The head end and the tail end respectively refer to the square steel beam on the outermost side of the two ends of the transverse bridge of the square steel beam bridge in the embodiment. Two-by-two adjacent square steel beam 1 is fixed through the bolt 13, and the width is 6600 mm. And coating non-vulcanized anticorrosive sealant at the joint of every two adjacent square steel beams 1.
The number of the steel pipes 6 is 4, the length of each steel pipe is 6800mm, the outer diameter of each steel pipe is 89mm, and the wall thickness of each steel pipe is 4 mm. Each steel pipe 6 passes a plurality of transverse connecting piece holes 3 from the head end to the tail end in turn along the direction of the bridge direction, and the two ends of each steel pipe extend out of the square steel beam 1 at the head end and the tail end by 100 mm.
And after passing through the top plate holes 5, self-leveling cement mortar is filled in the square steel beams 1 and is condensed and fixed with the steel pipes 6 to form a bridge bearing structure. The self-leveling cement mortar is prepared from mixed dry powder and water according to the weight part ratio of 1: (0.15-0.25), wherein the dry powder mixture comprises the following components in parts by weight: 1 part of cement, 0.5-1.5 parts of sand, 0.2-0.4 part of fly ash, 0.01-0.02 part of high-efficiency water reducing agent, 0.05-0.15 part of expanding agent, 0-0.00008 part of aluminum powder, 0-0.005 part of defoaming agent and 0.001-0.02 part of latex powder. The self-leveling cement mortar may be commercially available, for example, from Ovumgur mechanical corporation, Liuzhou or Guilin Hancheng technology corporation.
And the cement concrete pavement layer 9 is fixedly arranged above the top plates 12. The cement concrete pavement layer 9 comprises shear nails 7, a reinforcing mesh 8 and ordinary cement concrete 15, the shear nails 7 are welded on the top plate 12, and the types and the intervals of the shear nails are determined according to calculation and the specification of the design specification of the steel structure bridge of the highway. The reinforcing mesh 8 and the shear nails 7 are bound together, and the spacing and the type of the reinforcing mesh are implemented according to the general design specification of highway bridges and culverts. The ordinary cement concrete 15 is paved on the reinforcing mesh 8, the strength grade of the ordinary cement concrete is C40 ordinary cement concrete, and the thickness of the ordinary cement concrete is 10 cm.
The splicing method of the square steel beam bridge comprises the following steps:
step 1: drilling of square steel beams
Taking a plurality of square steel beams 1, wherein each square steel beam 1 comprises a bottom plate 10, two webs 11 respectively arranged at two sides of the bottom plate 10 and a top plate 12 arranged at the top ends of the two webs 11, and the bottom plate 10, the two webs 11 and the top plate 12 enclose a box body with a hollow interior;
the end parts of the two ends of the box body are plugged by plugging plates 2; a plurality of top plate holes 5 for filling self-leveling cement mortar are formed in the top plate 12 at equal intervals along the bridge direction; and correspondingly arranging a plurality of transverse connecting piece holes 3 for steel pipes 6 to pass through and a plurality of bolt holes 4 for bolts 13 to pass through on the two webs 11 at equal intervals along the bridge direction to obtain the square steel beam 1 after hole opening processing.
Step 2: mounting of square steel beams
And (3) transporting the square steel beams after the hole opening processing obtained in the step (1) to a construction site, arranging the square steel beams on a support 14 in sequence from the head end to the tail end in parallel along the direction of the transverse bridge, and fixing the adjacent two square steel beams 1 through the bolts 13. And coating non-vulcanized anticorrosive sealant at the joint of every two adjacent square steel beams 1. The non-vulcanized corrosion resistant sealant may be commercially available, for example, from Ohwimem mechanical, Inc., Liuzhou.
And step 3: through the transverse connecting piece
And sequentially passing a plurality of steel pipes 6 along the direction along the bridge direction through a plurality of transverse connecting piece holes 3 from the head end to the tail end, wherein the two ends of the transverse connecting piece holes extend out of the square steel beam 1 at the head end and the tail end by 100 mm.
And 4, step 4: self-leveling cement mortar filling
And after passing through the top plate holes 5, self-leveling cement mortar is filled in the square steel beams 1 and is condensed and fixed with the transverse connecting pieces 6 to form a bridge bearing structure.
And 5: laying cement concrete pavement layer
Firstly welding the shear nails 7 above the plurality of top plates 12, then binding the reinforcing mesh 8 and the shear nails 7 together, and then paving the common cement concrete 15 on the reinforcing mesh 8, wherein the strength grade of the common cement concrete 15 is C40, and the thickness of the common cement concrete 15 is 10cm, so that the square steel beam bridge is obtained.
Example 2
As shown in fig. 1 to 6, the square steel girder bridge of the present embodiment is located in myfortunes county, guangxi Guilin city, and is an underpass bridge spanning the side span of a river-crossing bridge. If a concrete structure is adopted, the building height needs to reach 1.2m and just exceeds 0.3m, so the square steel beam bridge is designed to solve the problems.
The standard span of the square steel beam bridge of the embodiment is 20m, and the clear length is 19.96 m. The superstructure adopts square steel beam bridge, and net length 19960mm, including support 14, cement concrete pavement layer 9 and 22 square steel roof beams 1, square steel roof beam 1 adopts shaped steel. Every square steel beam 1 all includes bottom plate 10, set up respectively in two webs 11 of bottom plate 10 both sides and set up in two the roof 12 on 11 tops of web, bottom plate 10, two web 11 with roof 12 encloses into inside hollow box. The side length of the cross section of the square steel beam 1 is 600mm, the thickness of the bottom plate 10 is 20mm, the thickness of the web plate 11 is 20mm, and the thickness of the top plate 12 is 20 mm.
The end parts of the two ends of each square steel beam 1 are respectively provided with a plugging plate 2 for plugging the box body; the side length of the plugging plate 2 is equal to the side length of the cross section of the square steel beam 1 minus twice the thickness of the web 11 and is equal to 560 mm.
7 top plate holes 5 for filling self-leveling cement mortar are arranged on the top plate 12 along the bridge direction at equal intervals; top plate hole 5 is the rectangle, and first top plate hole 5 distance the distance of 12 tip on the roof is 300mm, and the interval of two liang of adjacent top plate holes 5 is 3226 mm.
On two the web 11, along following the bridge direction, correspond with equidistant 7 transverse connection piece holes 3 and 14 bolt holes 4 that are used for the bolt 13 to pass through that are used for round steel 6 to pass through. The diameter of each transverse connecting piece hole 3 is 120mm, the distance from the first transverse connecting piece hole 3 to the end part of the web plate 11 is 300mm, the distance from the top part of the web plate 11 is 300mm, and the center distance between every two adjacent transverse connecting piece holes 3 is 3226 mm. Bolt holes 4, the diameter of which is 12mm, are provided above and below the left of each cross-connector hole 3.
The plurality of square steel beams 1 are sequentially arranged on the support 14 side by side from the head end to the tail end along the transverse bridge direction. The head end and the tail end respectively refer to the square steel beam on the outermost side of the two ends of the transverse bridge of the square steel beam bridge in the embodiment. Two liang of adjacent square steel beams 1 pass through bolt 13 is fixed, and the width is 600 mm. And coating non-vulcanized anticorrosive sealant at the joint of every two adjacent square steel beams 1. The non-vulcanized corrosion resistant sealant may be commercially available, for example, from Ohwimem mechanical, Inc., Liuzhou.
The number of the round steel 6 is 7, the length of the round steel is 13500mm, and the diameter of the round steel is 90 mm. Each round steel 6 sequentially passes through a plurality of transverse connecting piece holes 3 from the head end to the tail end along the direction of the bridge direction, and the two ends of each round steel extend out of the square steel beam 1 at the head end and the tail end by 150 mm.
And after passing through the top plate holes 5, self-leveling cement mortar is filled in the square steel beams 1 and is condensed and fixed with the round steel 6 to form a bridge bearing structure. The self-leveling cement mortar is prepared from mixed dry powder and water according to the weight part ratio of 1: (0.15-0.25), wherein the dry powder mixture comprises the following components in parts by weight: 1 part of cement, 0.5-1.5 parts of sand, 0.2-0.4 part of fly ash, 0.01-0.02 part of high-efficiency water reducing agent, 0.05-0.15 part of expanding agent, 0-0.00008 part of aluminum powder, 0-0.005 part of defoaming agent and 0.001-0.02 part of latex powder. The self-leveling cement mortar may be commercially available, for example, from Ovumgur mechanical corporation, Liuzhou or Guilin Hancheng technology corporation.
And the cement concrete pavement layer 9 is fixedly arranged above the top plates 12. The cement concrete pavement layer 9 comprises shear nails 7, a reinforcing mesh 8 and ordinary cement concrete 15, the shear nails 7 are welded on the top plate 12, and the types and the intervals of the shear nails are determined according to calculation and the specification of the design specification of the steel structure bridge of the highway. The reinforcing mesh 8 and the shear nails 7 are bound together, and the spacing and the type of the reinforcing mesh are implemented according to the general design specification of highway bridges and culverts. The portland cement concrete 15 is paved on the reinforcing mesh 8, and has the strength grade of C40 and the thickness of 10 cm.
The splicing method of the square steel beam bridge comprises the following steps:
step 1: drilling of square steel beams
Taking a plurality of square steel beams 1, wherein each square steel beam 1 comprises a bottom plate 10, two webs 11 respectively arranged at two sides of the bottom plate 10 and a top plate 12 arranged at the top ends of the two webs 11, and the bottom plate 10, the two webs 11 and the top plate 12 enclose a box body with a hollow interior;
the end parts of the two ends of the box body are plugged by plugging plates 2; a plurality of top plate holes 5 for filling self-leveling cement mortar are formed in the top plate 12 at equal intervals along the bridge direction; and correspondingly arranging a plurality of transverse connecting piece holes 3 for round steel 6 to pass through and a plurality of bolt holes 4 for bolts 13 to pass through at equal intervals along the bridge direction on the two web plates 11 to obtain the square steel beam 1 after the hole opening processing.
Step 2: mounting of square steel beams
Arranging the square steel beams subjected to the hole opening processing obtained in the step 1 side by side in sequence, fixing every two adjacent square steel beams 1 through the bolts 13, transporting to a construction site, and arranging the square steel beams on the support side by side in sequence from the head end to the tail end along the transverse bridge direction. And coating non-vulcanized anticorrosive sealant at the joint of every two adjacent square steel beams.
And step 3: passing through the round steel
And sequentially passing a plurality of round steel 6 along the direction along the bridge direction from the head end to the tail end, wherein the two ends of the transverse connecting piece holes 3 extend out of the square steel beam 1 from the head end to the tail end by 150 mm.
And 4, step 4: self-leveling cement mortar filling
And after passing through the top plate holes 5, self-leveling cement mortar is filled in the square steel beams 1 and is condensed and fixed with the round steel 6 to form a bridge bearing structure.
And 5: laying cement concrete pavement layer
Firstly welding the shear nails 7 above the plurality of top plates 12, then binding the reinforcing mesh 8 and the shear nails 7 together, and then paving the common cement concrete 15 on the reinforcing mesh 8, wherein the strength grade of the common cement concrete 15 is C40, and the thickness of the common cement concrete 15 is 10cm, so that the square steel beam bridge is obtained.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A square steel beam bridge comprises a support (14), a cement concrete pavement layer (9) and a plurality of square steel beams (1), wherein each square steel beam (1) comprises a bottom plate (10), two webs (11) respectively arranged on two sides of the bottom plate (10) and a top plate (12) arranged at the top ends of the two webs (11), the bottom plate (10), the two webs (11) and the top plate (12) enclose a hollow box body, and the square steel beam bridge is characterized in that end parts of two ends of each square steel beam (1) are respectively provided with a plugging plate (2) for plugging the box body; a plurality of top plate holes (5) for filling self-leveling cement mortar are arranged on the top plate (12) along the bridge direction at equal intervals; a plurality of transverse connecting piece holes (3) for a transverse connecting piece (6) to pass through and a plurality of bolt holes (4) for a bolt (13) to pass through are correspondingly arranged on the two webs (11) at equal intervals along the bridge direction;
the square steel beams (1) are sequentially arranged on the support (14) side by side from the head end to the tail end along the transverse bridge direction, and two adjacent square steel beams (1) are fixed through the bolts (13);
the number of the transverse connecting pieces (6) is multiple, each transverse connecting piece (6) sequentially penetrates through the plurality of transverse connecting piece holes (3) from the head end to the tail end along the bridge direction, and two ends of each transverse connecting piece hole respectively extend out of the square steel beam (1) at the head end and the tail end;
self-leveling cement mortar is filled in the square steel beams (1) after passing through the top plate holes (5) and is condensed and fixed with the transverse connecting pieces (6) to form a bridge bearing structure;
and the cement concrete pavement layer (9) is fixedly arranged above the top plates (12).
2. The square steel girder bridge according to claim 1, wherein the aperture of each of the cross connector holes (3) is 20mm-30mm larger than the diameter of the cross connector (6); the distance between two adjacent transverse connecting piece holes (3) on each web plate (11) along the transverse bridge direction is 2m-3 m.
3. The square steel girder bridge according to claim 1, wherein the transverse connection member (6) is a steel pipe or a round steel.
4. The square steel beam bridge of claim 1, wherein the self-leveling cement mortar is prepared by mixing dry powder and water in a weight part ratio of 1: (0.15-0.25), wherein the dry powder mixture comprises the following components in parts by weight: 1 part of cement, 0.5-1.5 parts of sand, 0.2-0.4 part of fly ash, 0.01-0.02 part of high-efficiency water reducing agent, 0.05-0.15 part of expanding agent, 0-0.00008 part of aluminum powder, 0-0.005 part of defoaming agent and 0.001-0.02 part of latex powder.
5. The square steel beam bridge according to claim 1, wherein a non-vulcanized anticorrosive sealant is painted at the joint of every two adjacent square steel beams (1).
6. The square steel girder bridge according to any one of claims 1 to 5, wherein the cement concrete pavement (9) comprises shear nails (7), a mesh reinforcement (8) and ordinary cement concrete (15), the shear nails (7) are welded to the top plate (12), the mesh reinforcement (8) is bound to the shear nails (7), and the ordinary cement concrete (15) is paved on the mesh reinforcement (8).
7. The square steel girder bridge according to claim 6, wherein the portland cement concrete (15) has a strength grade of not less than C40.
8. A splicing method of a square steel girder bridge according to any one of claims 1 to 7, comprising the steps of:
step 1: drilling of square steel beams
Taking a plurality of square steel beams (1), wherein each square steel beam (1) comprises a bottom plate (10), two webs (11) respectively arranged on two sides of the bottom plate (10) and a top plate (12) arranged at the top ends of the two webs (11), and the bottom plate (10), the two webs (11) and the top plate (12) form a box body with a hollow inner part in an enclosing mode;
the end parts of the two ends of the box body are plugged by plugging plates (2); a plurality of top plate holes (5) for filling self-leveling cement mortar are formed in the top plate (12) at equal intervals along the bridge direction; correspondingly forming a plurality of transverse connecting piece holes (3) for the transverse connecting pieces (6) to pass through and a plurality of bolt holes (4) for the bolts (13) to pass through at equal intervals on the two webs (11) along the bridge direction to obtain a square steel beam (1) after hole opening processing;
step 2: mounting of square steel beams
Transporting the square steel beams after the hole opening processing obtained in the step (1) to a construction site, arranging the square steel beams on a support (14) in parallel from the head end to the tail end in sequence along the direction of a transverse bridge, and fixing the square steel beams (1) which are adjacent in pairs through bolts (13);
and step 3: through the transverse connecting piece
Sequentially passing a plurality of transverse connecting pieces (6) through a plurality of transverse connecting piece holes (3) from the head end to the tail end along the bridge direction, wherein two ends of each transverse connecting piece hole respectively extend out of the square steel beam (1) at the head end and the tail end;
and 4, step 4: self-leveling cement mortar filling
Self-leveling cement mortar is filled in the square steel beams (1) after passing through the top plate holes (5) and is condensed and fixed with the transverse connecting pieces (6) to form a bridge bearing structure;
and 5: laying cement concrete pavement layer
And fixedly arranging the cement concrete pavement layer (9) above the top plates (12) to obtain the square steel beam bridge.
9. The splicing method of the square steel beam bridge as claimed in claim 8, wherein in the step 2, a non-vulcanized anticorrosive sealant is painted at the joint of every two adjacent square steel beams (1).
10. The splicing method of the square steel beam bridge according to claim 8, wherein in the step 5, the cement concrete pavement (9) is laid by the following method: firstly, the shear nails (7) are welded above the plurality of top plates (12), then the reinforcing mesh (8) and the shear nails (7) are bound together, and then the common cement concrete (15) is paved on the reinforcing mesh (8).
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1724437A (en) * | 2004-07-21 | 2006-01-25 | 柳州欧维姆机械股份有限公司 | High-strength cement mortar and construction process for pouring said mortar thereof |
| CN106284044A (en) * | 2016-08-29 | 2017-01-04 | 武汉理工大学 | A kind of Novel steel concrete composite bridge and construction method thereof |
| CN206034285U (en) * | 2016-08-12 | 2017-03-22 | 上海申继交通科技有限公司 | Antifatigue rigidity combination steel bridge deck pavement structure |
| CN107326792A (en) * | 2017-08-28 | 2017-11-07 | 周雷 | A kind of modularization steel bridge main bridge structure and its construction method |
| KR20180058971A (en) * | 2016-11-25 | 2018-06-04 | 정제평 | Concrete steel box girder with arch web double plate and its construction method |
| CN110357516A (en) * | 2019-06-11 | 2019-10-22 | 江苏洋河新城新材料有限责任公司 | A kind of waterproof polymer mortar and preparation method thereof |
-
2020
- 2020-02-13 CN CN202010090546.6A patent/CN111254834A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1724437A (en) * | 2004-07-21 | 2006-01-25 | 柳州欧维姆机械股份有限公司 | High-strength cement mortar and construction process for pouring said mortar thereof |
| CN206034285U (en) * | 2016-08-12 | 2017-03-22 | 上海申继交通科技有限公司 | Antifatigue rigidity combination steel bridge deck pavement structure |
| CN106284044A (en) * | 2016-08-29 | 2017-01-04 | 武汉理工大学 | A kind of Novel steel concrete composite bridge and construction method thereof |
| KR20180058971A (en) * | 2016-11-25 | 2018-06-04 | 정제평 | Concrete steel box girder with arch web double plate and its construction method |
| CN107326792A (en) * | 2017-08-28 | 2017-11-07 | 周雷 | A kind of modularization steel bridge main bridge structure and its construction method |
| CN110357516A (en) * | 2019-06-11 | 2019-10-22 | 江苏洋河新城新材料有限责任公司 | A kind of waterproof polymer mortar and preparation method thereof |
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Address after: 541004 the Guangxi Zhuang Autonomous Region Guilin City Seven Star District Building Road No. 12 Applicant after: GUILIN University OF TECHNOLOGY Address before: 541004 No. 12, Jiangan Road, Qixing District, Wuzhou City, Guangxi Zhuang Autonomous Region Applicant before: GUILIN University OF TECHNOLOGY |
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Application publication date: 20200609 |